The publisher of "Three Cups Of Tea," the inspirational memoir about reducing poverty and promoting education for girls in Afghanistan and Pakistan, says it is reviewing material in the best-selling following claims that parts of the book may have been fabricated.

The U.S. publisher, Viking, said on April 18 that it planned to review the claims of fabrication with author Greg Mortenson.

The U.S. television news program "60 Minutes" said in a broadcast that its reporting suggested that parts of the book's account of Mortenson's failed attempt in 1993 to climb the world's second-highest mountain peak, K2, and being kidnapped in the Waziristan region of Pakistan in 1996, were untrue.

The report also raised questions about Mortenson's charitable foundation and its reported work building schools in Afghanistan and Pakistan.

Mortenson has denied the allegations, saying he stands behind the information in his book.